Modeling and stability analysis of hybrid power systems for the more electric aircraft

This paper presents a detailed modeling and a comprehensive assessment of small-signal stability for a “more-electric” vehicular power system consisting of a synchronous variable-frequency generator which supplies power electronic controlled loads via an 18-pulse autotransformer rectifier unit for AC-DC conversion. Functional models for key power system components and loads are derived. Analytical derivations employed for small signal stability analysis based on linearized equations are described, and the influence of leading design parameters on system stability is evaluated.

► Modeling and stability assessment for “more-electric” vehicular power system.
► The analysed system comprises power electronic controlled loads prone to instability.
► Functional models of key power system components and loads are described.
► Linearized analytical models for small signal stability analyses are derived.
► The influence of leading design parameters on system stability is evaluated.